YOU SAID:

When I looked at her, I knew she was the one

INTO JAPANESE

私が彼女を見たとき、私は彼女が一人であることを知っていた

BACK INTO ENGLISH

When I saw her, I knew she was one

INTO JAPANESE

彼女を見たとき、私は彼女が一人であることを知っていた

BACK INTO ENGLISH

When I saw her, I knew she was one